Which of the Following Is Included in the Calculation of GDP

Multiple Choice

Which of the following is included in the calculation of GDP?

A) The purchase of tutoring services from a tutor who holds citizenship outside the country but resides within the country.
B) The purchase of a new edition of a foreign textbook that was produced in a different nation.
C) The purchase of ink and paper supplies by a textbook company for the production of new textbooks.
D) The purchase of a used textbook from a friend who took the same class last year.